Circumference of a circle.
Introduction
Circumference of the circle or perimeter of the circle is the measurement of the boundary across any two-dimensional circular shape including circle.
The Circumference (or) perimeter of a circle = 2πR .
where,
R is the radius of the circle
π is the mathematical constant with an approximate (up to two decimal points) value of 3.14 .
Objectives
Student will be able to find the circumference of circle with a visual experience ,
User Guideline;-
Use Start and Stop button then see carefully about the animation of figure.
Construction Protocol
1)Open Geogebra graphics window,
2) Take a point O(0,0) from input bar,
3)Take another point A(0,1),from tool bar,
4)Then take a segment with given length (6.28) from the point A,
5)Take a slider(0.1,6.28,0.01),
6)Take another point c from input bar , C=(a,1),
7)Take a circle with Radius (1) on point C ,
8)Take a point D on given circle using by point on object Tool,
9)Then take another D' point by using input bar ,Rotate(D,-a,C),
10) Now using circular Arc from tool bar then click on C,D,D' respectively ,
11) Then OD by using a segment ,
12) Finally show or hide line ,object,level and design from different color for satiable visualization of applet.
Test your Outstanding
Circumference of circle is =............... .